Once you have entered the pit of doom, you will need to climb the ancient Aztec sandstone steps, following the sandy path to the tree of fun. Aimed at families with primary school age kids, but interesting for all.
UPDATE - Visited and it is sad to see that that fun play things on the tree for the benefit of local children have been stolen. If we want children to care about nature, then it is critical that they enjoy their experience and that means it has to be fun as well as educational.